Lock nut device



Aug. 14, 1945.

A. A. SARGENT. JR

LOCK NUT DEVI CE Filed July 23, 1942 INVENTOR'.

1? Hi3 erZ e/ Jargeni. BY

Patented Aug. 14, 1945 LOCK NUT DEVICE Albert A. Sargent, Jr., NiagaraFalls, N. Y., as-

signor to United-Carr Fastener Corporation,

Cambridge, Mass, setts a corporation of Massachu- Application July 23,1942, Serial No. 451,992

10mm. (cl. 151-7) The present invention relates to lock nutinstallations of the type employing a resilient lock nut which may be offibre or the like and aims generally to improve such installations.

Among the principal aims and objects of the invention is the provisionof an improved simplified 'nut structure which may be formed of sheetmetal to which a fibre lock nut may be I attached. a

Other objects and advantages will be apparen to those skilled in the arton reference to the following drawing illustrating a preferredembodiment of the inventiom and in which Fig. 1 is a perspective view ofmy improved lock nut;

Fig. 2 is a vertical transverse sectional view taken on the line 2-2 ofFig. 1; I

'Fig. 3 is an enlarged vertical longitudinal sectional view of a typicalinstallation as taken on the line 3-3 of Fig. 1;

121g. 4 is a plan view of the fibre lock washer; an

Fig. 5 is a plan view .of the blank from which the nut is formed.

I Referring to theembodiment of the invention illustrated in thedrawing, the nut preferably comprises a base in formed with'a centraltubular shank ll drawn from the base and internally threaded as at l2 orcooperative threaded engagem'ent with a screw or bolt l3. The base ispreferably formed with longitudinal extensions or wings I l forattaching the nut to a suitable support I. Ifthe support I is of metal,the nut may be permanently attached thereto as by welds l5, but-ifdesired the wings it may be apertured as at I6 for the reception of ascrew or suitable fastening device (not shown) for attaching the nut tothe support i, as is obvious.

A yieldable lock nut or washer 20 preferablyformed of fibre is attachedto the base lil' opposite the shank II, and is formed with a threadedopening 2| of slightly less diameter than the diameter-oi the threadedbore l2, said opening 2i adapted to receive the threaded end 01. thescrew or bolt l3 and oiler 'a yieldable resistance to the passage of thescrew therethrough.

The fibre lock nut or washer 20 may be retained I in assembled positionon said base by any'suitable means, but advantageously it may beretained in a cage formed as an integral part of the base ll. Onesimplified way of accomplishing this is by rel-min; legs n on the basebent at right angles to the plane of the base for a distancesubstantially equal to the thickness of the nut or washer 20, and thenbent to form inwardly extending extensions l8 overlying a part of thebody of the nut 20.

One economical method of forming the nut is illustrated in Fig. 5,wherein an elongated recv tangular blank of metal is first formed with acentral drawn shank 12. The opposite ends are then slit (Fig. 5) to formthe central wings ll and the legs II on opposite sides thereof. Theselegs are then bent at right angles to the base and 'away from the shankH to form the legs I1 and then inwardly to form extensions It. The fibrewasher or nut 20 may then be inserted in the cage formed by the legs I1and extensions i8, and when axially aligned with the bore I2 of theshank H, the extensions may be bent inwardly toward the base to grip andhold the washer 20 in assembled position.

The lock nut of the present invention functions in the same manner asfibre lock nuts of prior design, in that the lock washers 20 ofier ayieldable resistance to the rotation of the screw therein and force thebolt rearwardly against the rear faces of the threads of the threadednut or shank ll.

The invention further provides an improved installation in that theattaching wings may be welded or otherwise secured to an aperturedsupport i with the barrel ll positioned in the'aperture of-a part 2 to.be supported and the two members secured together by the bolt or screwl3. Advantages of the invention are in the simplicity of the nutconstruction, the adaptability of the nut to permanent installations andthe replaceability oi the fibre lock washer when unduly worn.

The invention is not to be restricted to the details shown anddescribed, but includes as well equivalent constructions as defined inthe aptions of said base on opposite sides of said barrel being bentaway from said base and then towards each other for securing said washerin fixed a8- sembled position.

ALBERT A. BARGENT, Jn.

